extern void * map_sha1_file(unsigned char *sha1, unsigned long *size);
extern void * unpack_sha1_file(void *map, unsigned long mapsize, char *type, unsigned long *size);
extern void * read_sha1_file(unsigned char *sha1, char *type, unsigned long *size);
extern void * map_sha1_file(unsigned char *sha1, unsigned long *size);
extern void * unpack_sha1_file(void *map, unsigned long mapsize, char *type, unsigned long *size);
extern void * read_sha1_file(unsigned char *sha1, char *type, unsigned long *size);